Who has been buying Ohsung Advanced Materials stock?

1 distinct insiders have filed 21 disclosed insider purchases in Ohsung Advanced Materials (052420), most recently on 2026-05-07. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.

How many insider filings does Ohsung Advanced Materials have?

Ohsung Advanced Materials has 21 buy-side and 0 sell-side disclosures on record, covering ₩1.7B ($1.2M) in total reported value, spanning 2024-03-07 to 2026-05-07.

Where does StockDrifts get Ohsung Advanced Materials insider data?

From DART D001/D002 insider disclosures — the official filing system run by the Financial Supervisory Service (Korea). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from DART.

Do insider buys in Korean stocks predict returns?

Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean DART filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

Ohsung Advanced Materials 052420

Company

오성첨단소재Ohsung Advanced Materials

Insiders

Buys

Total Value

₩1.7B ($1.2M)

Avg Return

+10.72%

Last Filing

2026-05-07

Ohsung Advanced Materials (052420) has 21 disclosed insider purchases and 0 disclosed disposals on record, filed by 1 distinct insiders. Together those filings cover ₩1.7B ($1.2M) in reported transaction value. The earliest filing StockDrifts holds for Ohsung Advanced Materials is dated 2024-03-07; the most recent is 2026-05-07. All of it is parsed from DART D001/D002 insider disclosures, the official disclosure system operated by the Financial Supervisory Service (Korea). Across these filings the average return since disclosure is +10.72%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent insider trades

Date	Type	Source	Insider	Position	Shares	Price at filing	Return	Value
2026-05-07	SELL	주식병합	폴라버텍스 Polar Vertex	-	-10.8M	-	-	-
2026-05-07	SELL	주식병합	이스트버건디 East Burgundy	-	-11.5M	-	-	-
2025-04-08	BUY	제3자배정유상증자	폴라버텍스 Polar Vertex	-	1.9M	₩1,379	+12.0%	₩2.7B ($1.8M)
2025-04-08	BUY	제3자배정유상증자	이스트버건디 East Burgundy	-	1.9M	₩1,379	+12.0%	₩2.7B ($1.8M)
2025-01-17	BUY	제3자배정유상증자	폴라버텍스 Polar Vertex	-	2.0M	₩1,458	+6.0%	₩2.9B ($2.0M)
2025-01-17	BUY	제3자배정유상증자	이스트버건디 East Burgundy	-	2.0M	₩1,458	+6.0%	₩2.9B ($2.0M)
2025-01-17	BUY	기타	폴라버텍스 Polar Vertex	-	8.1M	₩1,458	+6.0%	₩11.9B ($8.2M)
2024-06-13	BUY	Market Buy	이스트버건디 East Burgundy	-	89.0K	₩1,548	-0.2%	₩138M ($96K)
2024-06-12	BUY	Market Buy	이스트버건디 East Burgundy	-	80.0K	₩1,495	+3.3%	₩120M ($83K)
2024-06-11	BUY	Market Buy	이스트버건디 East Burgundy	-	70.0K	₩1,516	+1.9%	₩106M ($74K)
2024-06-10	BUY	Market Buy	이스트버건디 East Burgundy	-	90.0K	₩1,507	+2.5%	₩136M ($94K)
2024-04-19	BUY	Market Buy	이스트버건디 East Burgundy	-	50.0K	₩1,341	+15.2%	₩67M ($47K)
2024-04-18	BUY	Market Buy	이스트버건디 East Burgundy	-	20.0K	₩1,350	+14.4%	₩27M ($19K)
2024-04-17	BUY	Market Buy	이스트버건디 East Burgundy	-	50.0K	₩1,329	+16.3%	₩66M ($46K)
2024-04-16	BUY	Market Buy	이스트버건디 East Burgundy	-	80.0K	₩1,305	+18.4%	₩104M ($73K)
2024-04-15	BUY	Market Buy	이스트버건디 East Burgundy	-	80.0K	₩1,317	+17.3%	₩105M ($73K)
2024-04-12	BUY	Market Buy	이스트버건디 East Burgundy	-	10.0K	₩1,325	+16.6%	₩13M ($9K)
2024-04-11	BUY	Market Buy	이스트버건디 East Burgundy	-	30.0K	₩1,344	+15.0%	₩40M ($28K)
2024-04-09	BUY	Market Buy	이스트버건디 East Burgundy	-	40.0K	₩1,364	+13.3%	₩55M ($38K)
2024-04-08	BUY	Market Buy	이스트버건디 East Burgundy	-	35.0K	₩1,359	+13.7%	₩48M ($33K)
2024-03-25	BUY	Market Buy	이스트버건디 East Burgundy	-	90.0K	₩1,449	+6.6%	₩130M ($91K)
2024-03-22	BUY	Market Buy	이스트버건디 East Burgundy	-	13.0K	₩1,423	+8.6%	₩18M ($13K)
2024-03-18	BUY	Market Buy	이스트버건디 East Burgundy	-	60.0K	₩1,418	+9.0%	₩85M ($59K)
2024-03-13	BUY	Market Buy	이스트버건디 East Burgundy	-	38.1K	₩1,392	+11.0%	₩53M ($37K)
2024-03-12	BUY	Market Buy	이스트버건디 East Burgundy	-	70.0K	₩1,399	+10.4%	₩98M ($68K)
2024-03-11	BUY	Market Buy	이스트버건디 East Burgundy	-	38.3K	₩1,403	+10.1%	₩54M ($37K)
2024-03-08	BUY	Market Buy	이스트버건디 East Burgundy	-	71.6K	₩1,395	+10.8%	₩100M ($69K)
2024-03-07	BUY	Market Buy	이스트버건디 East Burgundy	-	93.3K	₩1,393	+10.9%	₩130M ($90K)

Frequently asked questions

Who has been buying Ohsung Advanced Materials stock?: 1 distinct insiders have filed 21 disclosed insider purchases in Ohsung Advanced Materials (052420), most recently on 2026-05-07. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does Ohsung Advanced Materials have?: Ohsung Advanced Materials has 21 buy-side and 0 sell-side disclosures on record, covering ₩1.7B ($1.2M) in total reported value, spanning 2024-03-07 to 2026-05-07.
Where does StockDrifts get Ohsung Advanced Materials insider data?: From DART D001/D002 insider disclosures — the official filing system run by the Financial Supervisory Service (Korea). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from DART.
Do insider buys in Korean stocks predict returns?: Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean DART filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

Source filings

Every trade listed above is disclosed in DART D001/D002 insider disclosures, filed with the Financial Supervisory Service (Korea). View the original DART filings for Ohsung Advanced Materials. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.